Log Message:
py-pypiserver: updated to 1.3.2

1.3.2:
- ENH: The Dockerfile used for the official Docker images now uses Python 3.6
  rather than Python 2.7
- ENH: The `welcome.html` page has been updated to provide more metadata
  and be more HTML-standards compliant
- FIX: the `pypi-server -U` command no longer fails when run inside the
  Docker container
- FIX: The `remove_pkg` API action now removes any extant instances of a
  package name-version combination, not just the first one found. This means
  that now, for example, if a `.whl` and `.tar.gz` file exist for the
  requested package name and version, both will be removed
- FIX: include missing `simple/` path on a URL in the example pip commands
  on the `welcome.html` page
- DOC: more consistent and accurate documentation for pip commands provided
  on the `welcome.html` page
- DOC: fixes to the README to make it easier for people to use pypiserver
  behind an apache webserver